HOTS Questions: Sorting Materials into Groups | Class 6: Additional Practice PDF Download

Q1: When you go out with your parents and ask for a cool drink, as soon as the cap is opened, you might have observed the liquid coming out. Why?
Ans: The liquid comes out because the cool drink has gas inside it. This gas is called carbon dioxide, and it's what makes the drink fizzy. The gas is added to the drink when it's made. When we open the cap, the pressure inside the bottle becomes lower, and the gas tries to come out. This makes the liquid bubble up and sometimes spill out.

Q2: If you mix water and starch, what kind of solution do you get?
Ans: When you mix water and starch, you get a gooey mixture called a "colloidal solution." The starch doesn't dissolve like sugar in water. Instead, it breaks into tiny pieces that float around in the water. These tiny pieces are too small to see, but they make the water thicker.

Q3: If we keep fish out of water they die. Why?
Ans: Fish need water to breathe. They have special organs called gills that help them take oxygen from the water. When fish are out of the water, they can't get enough oxygen because air doesn't have as much oxygen as water. This makes it hard for them to breathe, and they eventually die.

Q4: Why will oil not mix with water?
Ans: Oil and water don't like each other because they are different. Water is watery and has something called "polarity," which makes water molecules stick together. Oil is different and doesn't have polarity. So, when we put oil and water together, they don't mix. They stay separate because water molecules stick to other water molecules, and oil sticks to other oil molecules.

Q5: The shopkeeper keeps similar type materials at one place. Why?
Ans: Shopkeepers put similar things together to make it easy for us to find what we need. When things are in the same place, we don't have to search all over the shop. It also helps the shopkeeper keep things organized and know what they have in stock. So, when we want something specific, we can go straight to the right place and find it quickly.

Q6: What is meant by the term "sorting"? Give an example of sorting materials into groups.
Ans: Sorting means arranging things based on their similarities or differences. For example, when you arrange different types of fruits like apples, bananas, and oranges in separate groups, you are sorting them based on their similarities as fruits.

Q7: List two examples of materials that can be sorted based on their appearance.
Ans: Two examples of materials that can be sorted based on their appearance are different types of leaves (like palm leaves, maple leaves, etc.) and various types of buttons (like round buttons, square buttons, etc.).

Q8: Explain how materials can be sorted into groups based on their uses. Provide one example.
Ans: Materials can be sorted into groups based on the purposes they serve. For instance, kitchen tools like knives, spoons, and forks can be sorted into a group for cooking, while toys like cars, dolls, and building blocks can be sorted into a group for playing.

Q9: Why is it important to use the right method of sorting for different types of materials? Give a relevant example.
Ans: Using the right method of sorting helps us accurately categorize materials. If we sort materials randomly, it might lead to confusion. For example, if we sort clothes by their color instead of type (like shirts, pants, etc.), it would be difficult to find the right clothing item when needed. Hence, using the correct sorting method is important for easy organization.

Q10: How do you think sorting helps us in managing things easily? Provide two examples.
Ans: Sorting helps us organize things in a systematic way, making it easier to find and use them. For instance, arranging books according to their subjects helps students quickly locate the book they need. Also, keeping clothes of similar types together in a wardrobe saves time when choosing an outfit.